In-medium changes of nucleon cross sections tested in neutrino-induced reactions
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| Format: | Preprint |
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2024
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| _version_ | 1866917800299200512 |
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| author | Bogart, B. Gallmeister, K. Mosel, U. |
| author_facet | Bogart, B. Gallmeister, K. Mosel, U. |
| contents | Historically studied in the context of heavy-ion collisions, the extent to which free nucleon-nucleon cross sections are modified in-medium remains undetermined by these data sets. Therefore, we investigate the impact of NN in-medium modifications on neutrino-nucleus cross section predictions using the GiBUU transport model. We find that including an in-medium lowering of the NN cross section and density dependence on $Δ$ excitation improves agreement with MicroBooNE neutrino-argon scattering data. This is observed for both proton and neutral pion spectra in charged-current muon neutrino and neutral-current single pion production datasets. The impact of collision broadening of the $Δ$ resonance is also investigated. The absence of $Δ$ broadening is slightly favored, but the larger uncertainties on the pion production data prevent definitive conclusions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_05921 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | In-medium changes of nucleon cross sections tested in neutrino-induced reactions Bogart, B. Gallmeister, K. Mosel, U. High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory Historically studied in the context of heavy-ion collisions, the extent to which free nucleon-nucleon cross sections are modified in-medium remains undetermined by these data sets. Therefore, we investigate the impact of NN in-medium modifications on neutrino-nucleus cross section predictions using the GiBUU transport model. We find that including an in-medium lowering of the NN cross section and density dependence on $Δ$ excitation improves agreement with MicroBooNE neutrino-argon scattering data. This is observed for both proton and neutral pion spectra in charged-current muon neutrino and neutral-current single pion production datasets. The impact of collision broadening of the $Δ$ resonance is also investigated. The absence of $Δ$ broadening is slightly favored, but the larger uncertainties on the pion production data prevent definitive conclusions. |
| title | In-medium changes of nucleon cross sections tested in neutrino-induced reactions |
| topic | High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2405.05921 |